圖片參考:http://i707.photobucket.com/albums/ww74/stevieg90/03-97.jpg
(http://i707.photobucket.com/albums/ww74/stevieg90/03-97.jpg)
Answer part (b) only, using (a):
圖片參考:http://i707.photobucket.com/albums/ww74/stevieg90/02-122.jpg
(http://i707.photobucket.com/albums/ww74/stevieg90/02-122.jpg)
更新1:
Lotus, 你還沒有回答第一題喔!
更新2:
最上邊那題: Show that the function is even...